The user, who goes by samstrayed, explained that they first decided to try the overnight technique after reading about its success in another person's comment. "I tried it last night with my innisfree volcanic clay mask and it worked!!," they wrote, going on to explain that their bigger pimples had come to a head and the redness was gone, while the smaller pimples had simply vanished. In terms of application, all they did was use a cotton bud to swab some of the mask and place it on the areas where they had acne, making sure to cover the entire perimeter. "When I woke up the clay was still in tact but the acne was not 😂," they wrote.

The user compared the effect to that of drying spot treatments — such as the famed Mario Badescu Drying Lotion — and added that the mask didn't leave behind any marks, either. What's more, they said it's helped them to stop popping, as now they just put the clay on any blemishes, rather than picking at them. Other Redditors chimed in with their own experiences, most of them boasting similar results.

"I dabbed some clay on two particularly large acne spots that hadn't quite come to head yet. Lo and behold, the next day they pretty much flattened out entirely. The red mark is still there but it's nowhere as huge of a bump as it was before," wrote a user who goes by Faiithless.

"I've done this for a while. The clay masks draw impurities out of the follicle and dry up the sebum," wrote another believer.

Naturally, with all the hype surrounding this seemingly "amazing" method, I had to consult a couple of trusted dermatologists for their expert insight. Joshua Zeichner, the director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York City, says that many products may be labeled as a mask, but can also be used as more of a leave-on skin treatment, which is what the Redditor did. "It may take time for active ingredients to penetrate and give their effect," he says, "so a full face treatment left in place for several hours may be of benefit for many products."

What's more, Zeichner says the volcanic ash and high levels of sulfur that the mask contains can be beneficial for acne-prone skin. "[Sulfur] is commonly used to treat a variety of inflammatory skin conditions, and may help acne by calming skin inflammation and killing acne-causing bacteria," he says.

Sejal Shah, another dermatologist in New York City, says the ingredients in this mask — clay, both kaolin and bentonite, and volcanic ash — are all drying agents, so she sees how this would act similar to a drying lotion treatment. Shah also notes that the mask contains both alpha and beta hydroxy acids, which exfoliate the skin and help to clear up acne. Her only concern? "This product has walnut shells and volcanic 'clusters,' which could be potentially damaging or overly abrasive to the skin due to irregular, possibly sharp, edges.”

So there you have it. If you're currently battling acne and looking for a new trick to tame breakouts, go ahead and add this K-Beauty mask to your list. Innisfree has a whole range of products that are worth a couple of test-drives. However, it can never hurt to get a second opinion. So if you're considering giving it a go, we recommend giving your dermatologist a ring beforehand to cover all your bases. In the meantime, you know what we'll be test-driving next time a pesky pimple (or, you know, three) pops up.